Antofagasta weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: January – December
What is the weather like in Antofagasta in September?
In September, Antofagasta is mild: daytime highs average 19 °C, and nights cool down to about 12 °C. The sea averages 15.3 °C – swimming is only for the hardy. The sun shines for around 9 hours a day. It hardly ever rains. All in all, September is an excellent month for a holiday in Antofagasta.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 96 | 99 | 100 |
| Day | 18° | 19° | 19° |
| Night | 11° | 12° | 12° |
| Sea | 15° | 15° | 16° |
| Sun | 8 h | 9 h | 10 h |
| Rain days | 1 | 0 | 0 |
More details for September
- Daylight
- 11 h 56 min07:39 – 19:35
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 34 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−3America/Santiago
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %93 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Antofagasta in September: quick answers
Is Antofagasta hot in September?
No. In September, Antofagasta is mild: daytime highs average 19 °C and nights drop to about 12 °C.
Can you swim in Antofagasta in September?
Only if you don't mind cold water: in September the sea averages just 15.3 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Antofagasta in September?
It hardly ever rains.
Antofagasta month by month
The whole year in AntofagastaAll destinations: ChileWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences